One way valve gasket



FIG. 1 is a perspective view of the gasket;

FIG. 2 is a top elevation view of the gasket;

FIG. 3 is a bottom elevation view of the gasket; and,

FIG. 4 is a front elevation view of the gasket, with the back elevation, left elevation and right elevation views identical to the front elevation view. 

The ornamental design for a one way valve gasket, as shown and described. 